475 Amp Cable Size at 25 Meters (690V Three-Phase (Wind / Heavy Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 475 A over 25 m (82.0 ft).
Copper Cable (≤3% Drop)300 mm²Drop: 1.47V (0.21%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 1.82V (0.26%)
Voltage at Load688.5 VLine Loss: 1207.1 W
Max Power & Breaker567.68 kW500A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 475A at 25m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 293.44 V (42.53%) | 396.6 V | 484.04 V (70.15%) | 241418.7 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 176.06 V (25.52%) | 513.9 V | 290.42 V (42.09%) | 144851.2 W | Drop High |
| 4 mm² | 32 A | 25 A | 110.04 V (15.95%) | 580.0 V | 181.51 V (26.31%) | 90532.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 73.36 V (10.63%) | 616.6 V | 121.01 V (17.54%) | 60354.7 W | Drop High |
| 10 mm² | 57 A | 44 A | 44.02 V (6.38%) | 646.0 V | 72.61 V (10.52%) | 36212.8 W | Drop High |
| 16 mm² | 76 A | 59 A | 27.51 V (3.99%) | 662.5 V | 45.38 V (6.58%) | 22633.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 17.61 V (2.55%) | 672.4 V | 29.04 V (4.21%) | 14485.1 W | Drop High |
| 35 mm² | 125 A | 97 A | 12.58 V (1.82%) | 677.4 V | 20.74 V (3.01%) | 10346.5 W | Drop High |
| 50 mm² | 151 A | 118 A | 8.8 V (1.28%) | 681.2 V | 14.52 V (2.1%) | 7242.6 W | Drop High |
| 70 mm² | 192 A | 150 A | 6.29 V (0.91%) | 683.7 V | 10.37 V (1.5%) | 5173.3 W | Drop High |
| 95 mm² | 232 A | 181 A | 4.63 V (0.67%) | 685.4 V | 7.64 V (1.11%) | 3811.9 W | Drop High |
| 120 mm² | 269 A | 210 A | 3.67 V (0.53%) | 686.3 V | 6.05 V (0.88%) | 3017.7 W | Drop High |
| 150 mm² | 309 A | 241 A | 2.93 V (0.43%) | 687.1 V | 4.84 V (0.7%) | 2414.2 W | Drop High |
| 185 mm² | 353 A | 275 A | 2.38 V (0.34%) | 687.6 V | 3.92 V (0.57%) | 1957.4 W | Drop High |
| 240 mm² | 415 A | 324 A | 1.83 V (0.27%) | 688.2 V | 3.03 V (0.44%) | 1508.9 W | Drop High |
| 300 mm² | 477 A | 372 A | 1.47 V (0.21%) | 688.5 V | 2.42 V (0.35%) | 1207.1 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 1.1 V (0.16%) | 688.9 V | 1.82 V (0.26%) | 905.3 W | ✓ OK (≤3%) |
FAQ — 475 Amp Cable Size at 25 Meters (690V Three-Phase (Wind / Heavy Industrial))
What mm² cable size is required for 475A at 25 meters (690V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 300 mm² copper cable for 475A over 25m at 690V (voltage drop: 1.47V or 0.21%).
What is the power capacity of 475A at 690V?
At unity power factor, 475A at 690V supports 567.68 kW with a standard 500A circuit breaker.
Related Lengths & Currents (690V)
475A · 5m (690V)475A · 10m (690V)475A · 15m (690V)475A · 20m (690V)475A · 30m (690V)475A · 35m (690V)475A · 40m (690V)475A · 45m (690V)475A · 50m (690V)475A · 60m (690V)475A · 70m (690V)10A · 25m (690V)16A · 25m (690V)20A · 25m (690V)25A · 25m (690V)32A · 25m (690V)40A · 25m (690V)50A · 25m (690V)63A · 25m (690V)80A · 25m (690V)100A · 25m (690V)125A · 25m (690V)160A · 25m (690V)200A · 25m (690V)